Regarding that georeferencing, can you check the project and output coordinate system in the application settings?
But if you were converted the geo systems, it shouldn’t cause this.
The problem for georeferencing could be just almost 5m error for point 0. Do you need that model scaled and georeferenced?
According to GPU/CPU behaviour it seems like corrupted model. I would create a new one and then try to texture that.
Exporting registration could help, but then you will need to compute the model again.